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11.5. Tuning the Index

11.5.1. Near-Realtime Index Manager
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By default, each update is immediately flushed into the index. In order to achieve better throughput, the updates can be batched. However, this can result in a lag between the update and query -- the query can see outdated data. If this is acceptable, you can use the Near-Realtime Index Manager by setting the following. 
<property name="default.indexmanager">near-real-time</property>
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11.5.2. Tuning Infinispan Directory
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Lucene directory uses three caches to store the index:
  • Data cache
  • Metadata cache
  • Locking cache
Configuration for these caches can be set explicitly, specifying the cache names as in the example below, and configuring those caches as usual. All of these caches must be clustered unless Infinispan Directory is used in local mode.

Example 11.5. Tuning the Infinispan Directory

<distributed-cache name="indexedCache" mode="SYNC" owners="2">
    <indexing index="LOCAL">
        <property name="default.indexmanager">org.infinispan.query.indexmanager.InfinispanIndexManager</property>
        <property name="default.metadata_cachename>lucene_metadata_repl</property>
        <property name="default.data_cachename">lucene_data_dist</property>
        <property name="default.locking_cachename">lucene_locking_repl</property>
    </indexing>
</distributed-cache>

<replicated-cache name="lucene_metadata_repl" mode="SYNC" />

<distributed-cache name="lucene_data_dist" mode="SYNC" owners="2" />

<replicated-cache name="lucene_locking_repl" mode="SYNC" />
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11.5.3. Per-Index Configuration
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The indexing properties in examples above apply for all indices - this is because we use the default. prefix for each property. To specify different configuration for each index, replace default with the index name. By default, this is the full class name of the indexed object, however you can override the index name in the @Indexed annotation.
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